ETHYL CYCLOPENTENOLONE PRODUCT NAME ETHYL CYCLOPENTENOLONE SYNONYM 3-ETHYLCYCLOPENTAN-1,2-DIONE CODE 3309 CAS Nº 21835-01-8 FEMA Nº 3152 EINECS 244-606-5 FORMULA C7 H10 O2 MOLECULAR WEIGHT 126,15